Stave-crozing machine



t Unirse rens Brice@ DANIEL HALLADAY, 0F BA'IAVIA, ILLINOIS.

STAVEV=CROZING MACHINE.

SPECIFICATION forming partof Letters Patent No. 232,489, dated September 21, 1880.

Application filed April (l, 1880. (No model.)

To all whom it 'may concern Be it known that I, DANIEL HALLADAY, ot' Batavia, Illinois, have invented a new and useful Machine for Cronin g Tank-Staves, of which the following is a specitication.

The object of my invention is to effect the expeditious and accurate crozin g of tankstaves; and for this purpose the end of the stave Where it is to tit onto the tank-bottom is caused to swing under a revolving cutter-head which cuts the crozing. rIhe stave is caused to swing in the arc of a circlewhose radius corresponds to the radius ot" the tank-bottom.

Where the bottom and top of the tank havethe same diameter the stave swings on a horizontal table, and where the top of the tank is smaller than the bottom the narrow or top end of the stave is elevated to correspond to.

the taper of the tank. In other words, the stave is placed in the same position with reference tothehorizontal axis on which it swings as itis to occupyin the tank with reference to a vertical line, around which, as a center, the staves are arranged, and the plane of revolu= tion of the cutter-head during the operation of crozin g makes the same angle with the stave as ,the stave does with the bottom ofthe tank when set up for use.

In the drawings, Figure l is a front view of the machine in elevation, and Fig'. 2 is a sectional end `view of that part of the machine shown in Fig. l to the left of the broken line V.

A revolving cutter-head, Q, is supported 011 the end ofa horizontal shaft running in boxes attached to a casting, S, which is secured upon a Wooden frame, T, in such a manner that the cutter-head projects beyond the wooden frame six or seven inches, or as far as the distance of the crozing from the ends of the staves demands.

The cutter-head is driven by means of a pulley, It, placed upon the shaft, between the two journals.

The stave to be crozed is placed upon a swinging table, A, in such a manner that its lower end will swing beneath the cutter-head at the point Where it is desired to have the crozing cut.

The table A is supported by hangers D D, made of wrought-iron, bent as shown in Fig. 2.

The hangers D D are continuations of the ila-t iron han gers E E, which hin ge on the bolts H H, inserted in the fixed timbers U U, supported from above, and framed together by means ofthe cross-pieces I I and braces J J.

The distance of the bolt H from the lower edge of the peri pheryof the cutter-head should be equal to the radius of the tank-bottom, and the hangers E E, as well as the timbers U U, have a number of holes at intervals, corresponding to tanks of different radii, for receiving the bolts H H.

The hangers D D are fastened to the hangers E E by bolts G Gr, fitting holes in E Eand passing through slots in D D, so as to allow the height of the table A to be adjusted according to thickness of staves, depth ofF orozing required, and taper ot' tank, for the position ot' the stave with reference to the axis H H and plane of cutter-head Q must be the same as it is to be with reference to the axis and bottom of tank.

rEhe adj ustin g-screws F F are convenient for adjusting the height ofthe table previous to turning up the nuts of the bolts G G.

In order that staves of diiferent widths may always have their proper position with reference to the axis H H, they are not laid directly upon the fiat surface of the table A, but upon circular segments C C, attached to the table, the curvature of whose upper faces corresponds to that ot' the circles in which they swing. Otherwise the depth of the crozing would not always be the same on both edges of the staves'. The edge of the stave is made to rest against fixed stops, whose faces are in a plane including the axis H H. If the staves to a tank were all of the same width, plane surfaces properly inclined would answer in place of the circular segments O C, and staves of various widths could be so placed upon the plane surface of the table that the crozing would be of the same depth on both edges of the same stave; but this would require adjustments for each stave according to its Width, and would not secure the same depth of crozing at the edges of staves of different Widths. Hence the importance of the circular segments C for securing a uniform depth of crozing at the edges ofthe staves, whatever their width. Of Ioo course there must be a separate set of circular segments for each size of tank, or at least for each position of the bolts H H.

The table A is kept parallel With the plane ofthe axis H H while swinging by means'ot' a stout shaft, L, turning at its ends in supports fastened to the door, and having rigidly attached near each end two equal parallel arms, K K, whose outer ends are connected with the hangers D D my means of links l? I). Any longitudinal movement of the table A is prevented by a bent piece of flat iron, N, attached to the under side of the table and sliding between two guides, O O, fastened to the frame T.

The table A may be moved by mea-ns of a lever or handle attached to the shaft L, or in any convenient way.

What I claim as my invention isl. In a croZing-machine, the circular segments C O,attached to a swinging table, A, supported by hangers E E, hinged on movable bolts H H,iuserted in fixed timbers U U, in

combination with the overhan gin g cutter-head Q, supported upon a frame, T, as and for the purpose herein shown and specified.

2. In a crozing-machine, the adj usting-screws F F, in combination with the hangers E E, slotted pieces D D, and revolving cutter Q, for the purpose of adjusting the height and inclination of the swinging table A, as specified.

3. In a crozing-machine, the shaft L, having arms K K, connecting, by links P, with the pieces D D, in combination with the revolving cutter Q, for the purpose of securing parallel motion to the swinging table A, as shown and described.l

DANIEL HALLADAY.

Witnesses:

GEO. O. SPooNER, EDWARD J. PARKER. 

